Is it good to have genetic variation within a species? Why?

Ascientist and her team counted 200 individual deer in an area of 10 square kilometers. what is the population density?

When analyzing tree rings, what do scientists assume a thin ring indicates?

How does the diagram explain ocean currents? earth tilt 23.5 degreesquestion 1 options: earth's tilt causes uneven heating of earth which causes currents.earth's tilt causes the ocean to move because of gravity.earth's tilt and its rotation cause currents.earth's tilt causes uneven distribution of salt which causes currents.